My mom used to sing this to me when I was baby, I cry every time I hear it but I calms me down and comforts me all the same. She never knew all the lyrics but I like her version a little better:
You are my sunshine, my only sunshine, you make me HAAAAAPPYY when skies are gray, you'll never know DEEEEAAAARRRR how much I love you, please don't take my sunshine away, please don't take my sunshine away...